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27 April, 01:55

If 6.42 g of water is produced, how many grams of oxygen gas reacted?

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  1. 27 April, 02:06
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    5.76g

    Explanation:

    2H2 + O2 = > 2H2O

    Molar mass of H2O = 18g/Mol

    No of mole of H2O = 6.42/18 = 0.36 moles of water.

    1 mole of O2 gives 2 moles of water.

    Xmole of O2 gives 0.36 moles of water.

    X = 0.36/2 = 0.18 mole

    Molar mass of O2 = 32g/mol

    Mass = 32 * 0.18 = 5.76g.
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